Fully upholstered fabric backs - not just a cushioned pad! Full 1 1/4" Padding on the seat with a Scotchguard treated fabric. Double Hinge on each side of chair to prevent legs from buckling. Heavy 18 gauge durable steel frame. "V" Shape Plugs on rear legs for added stability. Double Riveted "U" Brace --far stronger than any other welded straight brace. Available in six color combinations, with matching glides. Must be ordered in multiples of 4.